Apparatus for hardening the teeth of card-clothing.



N0. 84:0,090 PATBNTED JAN. 1', 1907.

L. 0. SCHNEIDER. APPARATUS FOR HARDBNING THE TEETH 0F CARD CLOTHING.

APPLICATION FILED MAY 8, 1906.

THE NORRIS PErE'Rs cm, WASHINGTON, D. c.

sible to the spot where the teeth are heated UNITED STATES PATENTOFFICE.

LOUIS CONSTANTIN SCHNEIDER, OF MITTWEIDA, GERMANY.

Specification of Letters Patent.

Patented Jan. 1, 1907.

Application filed May 8,1906. Serial No. 315,747.

To all whom it may concern:

Be it known that 1, Louis OONSTANTIN SCHNEIDER, a citizen of theUnited'States of America, and a resident of Sudstrasse 9, Mittweida,Kingdom of Saxony, German Empire, have invented new and usefulImprovements in Apparatus for Hardening the Teeth of Card-Clothing, ofwhich the following is a specification.

The present invention relates to improvements in apparatus for hardeningthe teeth of card-clothing. The difierence between the present inventionand the known means and apparatus which are used for this purpose,wherein the card-clothing with its projecting teeth is passed into ahardening or water bath after the teeth have been heated to redness, isthat according to the present invention the quantity of liquid employedfor hardening the teeth is controlled or regulated according to theextent or length to which the teeth are to be hardened. This is effectedby means of an endless traveling surface of velvet, plush, or the like,damped with the hardening liquid to the extent required. Further, thisliquid is brought as near as posto redness and the red-hot teeththemselves are not passed through the hardening liquid. According to thepresent invention this object is obtained as follows: An endless band ispassed round a drum which revolves in the hardening liquid, or thesurface of the drum itself may be moistened with the liquid, and theliquid itself is'brought as near as possible to the spot where the teethare heated to redness, so as to attain the end aimed at in all hardeningprocessesviz., to prevent the teeth cooling off before they reach thehardening bath. 7

The endless band which carries the hardening liquid to the points of theheated teeth is saturated with liquid by the rotation of the drum. Inorder to regulate and determine the degree of saturation or moisteningaccording to the extent or length to which the teethpoints are to behardened, an adjustable blade or roller is arranged to contact with theflexible endless band as it rises from the liquid, and thus remove somuch of the liquid as is superfluous for hardening the points of theteeth to the length desired. The nature or quality, however, of the banditself, which is preferably of a plush-like material, determines to someextent the length to which the hardening of the teeth is performed. Thetraveling endless band can also be made to pass round an adjustable barof wedgeshaped section or round an adjustable roller, so as to introducethe moistened band as closely as possible between the points of teethand the mouth of the nozzle which emits the heatingjet. If instead ofthe traveling band the surface of the immersed drum itself is used forconveying the hardening liquid, in this case also the quantity ofmoisture carried by the surface is regulated by means of an adjustableblade or roller arranged to come into contact with the surface of thedrum.

In the accompanying drawings, Figure 1 represents in section a hardeningapparatus constructed according to the present invention. Fig. 2 showspart of a hardening apparatus of 'a modified form, and Fig. 3 part ofanother modification of such apparatus.

Referring to Fig. 1, a is a brake device under which the strip ofcard-clothing d is passed, first onto an endless band I) and hereinafterround a guiding-drum 0. During such traveling the teeth of thecard-clothing d are subjected in known manner to a flame of gas issuingfrom a nozzle 6. f is a receptacle or trough which contains thehardening liquid, and g a drum journaled in'this receptacle or trough Anendless flexible band 7', which passes round the drum g, travels.through the hardening liquid as the drum revolves. This band thussaturated is led in the direction of the arrow h to meet thecardclothing d. i is a bar of wedge-shaped sec tion round which the bandsaturated passes to return hereinafter to the trough. 7c 1 are a pair ofrollers which serve to insure the proper pressure of the moistenedendless band j against the heated teeth-points of the card-clothing. mis a blade arranged to press against the surface of the flexible band,

so as to regulate or control the quantity of liquid which it carries.This blade m removes the superfiuous liquid and returns it to the troughf. The blade m is adjustably arranged in a bearing on the flange of thetrough, so as to determine exactly the quantity of liquid conveyed tothe points of the carding-teeth, and consequently the extent or lengthto which they are to be hardened. The beveled form of the bar i, roundwhich the endless yielding band 3' passes, allows such band to bebrought quite close up to the nozzle 6, so as to reduce to a minimum thespace between the heating and hardening positions, and thus prevent theheated teethpoints from cooling off before they come into contact withthe band j, conveying the bardening liquid. By the adjustment of the bar7} against the points of the teeth the length to which the latter are tobe hardened may be regulated as well as by the quantity of liquidconveyed by the traveling band.

In the modified form shown in Fig. 2 an adjustable roller n is employedinstead of the adjustable bar i. In this case an adjustable blade m mayalso be arranged to press upon the band j to regulate the quantity ofliquid conveyed by it.

Fig. 3 shows another modification of the apparatus represented inFig. 1. According to such modification the drum 9 itself may be used forthis purpose instead of the traveling band. In this case the blade m,adjustably mounted on the flange of the trough f, is applied or presseddirectly to the surface of the drum rotating within the trough in orderto remove any superfluous liquid therefrom. The surface of such drum mayadvantageously consist of a covering 0, adapted to take up the hardeningliquid.

The results actually obtained by the apparatus described are, shortly,as follows: First, the carding-teeth which it is desired to harden arenot passed through the hardening liquid; second, the hardening liquid isconveyed to the points of the teeth by means of a saturated surface andis uninterruptedly applied to them immediately behind the spot wherethey are heated to redness,- so that a continuous fresh supply ofhardening liquid is led to the teeth-points, and, third, the degree ofsaturation of the band or roller with the liquid which is to be conveyedto the teeth can be exactly regulated and determined according tothelength to which the teeth are to be hardened.

What I claim is 1. In an apparatus for hardening teeth of card-clothing,the combination with means for feeding said clothing, of a receptaclecontaining the hardening liquid, means for heat ing the teeth, means forsupplying the hardening liquid from the receptacle to the heated teethand means for controlling the supply of the hardening liquid to theteeth, substan tially as and for the purpose specified.

2. In an apparatus for hardening teeth of card-clothing, the combinationwith means for feeding said clothing, of a receptacle containing thehardening liquid, means for heating the teeth, an endless yielding bandconveyer for supplying the hardening liquid from the receptacle to theheated teeth and means for controlling the supply of the hardeningliquid to the teeth, substantially as and for the purpose specified.

3. In an apparatus for hardening teeth of cardclothing, the combinationwith means for feeding said clothing, of a receptacle containing thehardening liquid, means for heating the teeth, an endless yielding bandconveyer of pile fabric for supplying the hardening liquid from thereceptacle to the heated teeth to be hardened and means for controllingthe supply of the hardening liquid to the teeth, substantially as andfor the purpose specified.

4. In an apparatus for hardening teeth of card-clothing, the combinationwith means for feeding said clothing, of a receptacle containing thehardening liquid, means for heating the teeth, an endless band conveyerfor supplying the hardening liquid from the receptacle to the heatedteeth, and an adjustable bar for adjusting the upper end of the bandconveyer against the heated teeth to be hardened, substantially as andfor the purpose specified.

5. In an apparatus for hardening teeth of card-clothing, the combinationwith means for feeding said clothing, of a receptacle containing thehardening liquid, means for heating the teeth, an endless band conveyerfor supplying the hardening liquld from the receptacle to the heatedteeth, an adjustable bar for adjusting the upper end of the bandconveyer against the heated teeth to be hardened and an adjustable bladefor controlling the supply of the hardening liquid before reaching theteeth, substantially as and for the purpose specified.

6. In an apparatus for hardening teeth of card-clothing, the combinationwith means for feeding said clothing, of a receptacle containing thehardening liquid, a gas-burning nozzle for heating the teeth, an endlessyielding band conveyer of pile fabric for supplying the hardening liquidfrom the receptacle to the heated teeth, an adjustable bar for adjusting the upper end of the band conveyer against the heated teeth tobe hardened and an adjustable blade for controlling the supply of thehardening liquid before reaching the teeth, substantially as and for thepurpose specified.

7. In an apparatus for hardening teeth of card-clothing, the combinationwithan endless band for feeding said clothing, of a receptaclecontaining the hardening liquid, a gasburning nozzle for heating theteeth, an endless yielding band conveyer of pile fabric for supplyingthe hardening liquid from the receptacle to the heated teeth, anadjustable bar for adjusting the upper end ofv the band oonveyer againstthe heated teeth to be enoe of two Witnesses, this 20th day of April,harldenediland ari adjfustlalablle bade fOll 00nd 1906. tro ling t e supy 0 t e ar ening iqui before reaohing the teeth, substantially as LOUISOONSTANTIN SCHNEIDER 5 and for the purpose specified. Witnesses:

In testimony that I claim the foregoing as FREDERICK J. DIETZMAN, myinvention I have signed my name,in pres- LEoPoLD MATTHIAE.

